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Source: — Data Sufficiency |
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by aditya8062 » Thu Apr 04, 2013 7:36 am
my take wud be A .plz confirm the OA so as i may put the solution
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by shivshankar054 » Thu Apr 04, 2013 8:10 am
Yes, statement 1 is sufficient. Can you plz explain how you solved it??
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by aditya8062 » Thu Apr 04, 2013 8:35 am
oki with ST 1 we know that -1< X < 0 so as per the definition of that function i will get the X as 0

now with st 2 i have -0.5 < x < 0.5 . now as per the definition of that function i may have X as 0 or X as 1
hence A
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by Anju@Gurome » Thu Apr 04, 2013 8:37 am
shivshankar054 wrote:For all z, [z] denotes the least integer greater than or equal to z. Is [x] = 0?
(1) -1 < x < -0.1
(2) [x + 0.5] = 1
Statement 1:
If -1 < x < -0.1, 0 is the least integer, which is greater than or equal to x

Sufficient

Statement 2: implies 0 < x + 0.5 ≤ 1 ---> -0.5 < x ≤ 0.5
If x = -0.4, [x] is 0.
If x = +0.4, [x] is 1

Not sufficient.
[spoiler]
The correct answer is A.[/spoiler]
Anju Agarwal
Quant Expert, Gurome

Backup Methods : General guide on plugging, estimation etc.
Wavy Curve Method : Solving complex inequalities in a matter of seconds.

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by shivshankar054 » Thu Apr 04, 2013 9:42 am
Thank you very much!!
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